Ponce, J. L., U. Mac?as, F. D. ?lvarez, J. V. Vel?zquez, L. Avenda?o, and J. Ly. “Low Doses of Gonadotropin Chorionic Equine (GCe) to Pelibuey and Pelibuey X Romanov Ewes”. Cuban Journal of Agricultural Science, vol. 47, no. 1, Mar. 2013, https://www.cjascience.com/index.php/CJAS/article/view/252.